<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <script type="text/javascript">
        function fun() {
            alert(arguments)
            alert(arguments.length)
            alert(arguments[0])
            alert(arguments[1])
            alert(arguments[2])
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        fun(1,"asd","动物");
    </script>
</body>
</html>